[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Aug 18 18:02:11 UTC 2023


This is an automated weekly mailing describing the state of the Global
IPv4 Routing Table as seen from APNIC's router in Japan.

The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG
TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG.

Daily listings are sent to bgp-stats at lists.apnic.net.

For historical data, please see https://thyme.apnic.net.

If you have any comments please contact Philip Smith <pfsinoz at gmail.com>.

IPv4 Routing Table Report   04:00 +10GMT Sat 19 Aug, 2023

  BGP Table (Global) as seen in Japan.

Report Website:     https://thyme.apnic.net
Detailed Analysis:  https://thyme.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined:                              927242
    Prefixes after maximum aggregation (per Origin AS):          352002
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      452701
Total ASes present in the Internet Routing Table:                 74748
    Prefixes per ASN:                                             12.40
Origin-only ASes present in the Internet Routing Table:           64164
Origin ASes announcing only one prefix:                           26373
Transit ASes present in the Internet Routing Table:               10584
Transit-only ASes present in the Internet Routing Table:            454
Average AS path length visible in the Internet Routing Table:       4.2
    Max AS path length visible:                                     132
    Max AS path prepend of ASN ( 37447)                             129
Prefixes from unregistered ASNs in the Routing Table:              1002
    Number of instances of unregistered ASNs:                      1004
Number of 32-bit ASNs allocated by the RIRs:                      42455
Number of 32-bit ASNs visible in the Routing Table:               34992
Prefixes from 32-bit ASNs in the Routing Table:                  174304
Number of bogon 32-bit ASNs visible in the Routing Table:            29
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            566
Number of addresses announced to Internet:                   3052365312
    Equivalent to 181 /8s, 239 /16s and 102 /24s
    Percentage of available address space announced:               82.4
    Percentage of allocated address space announced:               82.4
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:      308880

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                   246132
    Total APNIC prefixes after maximum aggregation:               70385
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          239730
    Unique aggregates announced from the APNIC address blocks:    98919
APNIC Region origin ASes present in the Internet Routing Table:   13600
    APNIC Prefixes per ASN:                                       17.63
APNIC Region origin ASes announcing only one prefix:               4035
APNIC Region transit ASes present in the Internet Routing Table:   1806
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         27
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8923
Number of APNIC addresses announced to Internet:              773395072
    Equivalent to 46 /8s, 25 /16s and 18 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-153913
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                    271743
    Total ARIN prefixes after maximum aggregation:               123850
    ARIN Deaggregation factor:                                     2.19
Prefixes being announced from the ARIN address blocks:           273832
    Unique aggregates announced from the ARIN address blocks:    130932
ARIN Region origin ASes present in the Internet Routing Table:    19099
    ARIN Prefixes per ASN:                                        14.34
ARIN Region origin ASes announcing only one prefix:                6970
ARIN Region transit ASes present in the Internet Routing Table:    1960
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4818
Number of ARIN addresses announced to Internet:              1276006400
    Equivalent to 76 /8s, 14 /16s and 80 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-401308
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                    260223
    Total RIPE prefixes after maximum aggregation:               122560
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           257147
    Unique aggregates announced from the RIPE address blocks:    159996
RIPE Region origin ASes present in the Internet Routing Table:    28405
    RIPE Prefixes per ASN:                                         9.05
RIPE Region origin ASes announcing only one prefix:               12054
RIPE Region transit ASes present in the Internet Routing Table:    3939
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          35
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11302
Number of RIPE addresses announced to Internet:               716347264
    Equivalent to 42 /8s, 178 /16s and 151 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-216475
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                  118279
    Total LACNIC prefixes after maximum aggregation:              28588
    LACNIC Deaggregation factor:                                   4.14
Prefixes being announced from the LACNIC address blocks:         117328
    Unique aggregates announced from the LACNIC address blocks:   49655
LACNIC Region origin ASes present in the Internet Routing Table:  11017
    LACNIC Prefixes per ASN:                                      10.65
LACNIC Region origin ASes announcing only one prefix:              2697
LACNIC Region transit ASes present in the Internet Routing Table:  2325
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        70
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8830
Number of LACNIC addresses announced to Internet:             178547712
    Equivalent to 10 /8s, 164 /16s and 108 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-273820 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                  29863
    Total AfriNIC prefixes after maximum aggregation:              5919
    AfriNIC Deaggregation factor:                                  5.05
Prefixes being announced from the AfriNIC address blocks:         38639
    Unique aggregates announced from the AfriNIC address blocks:  12725
AfriNIC Region origin ASes present in the Internet Routing Table:  1778
    AfriNIC Prefixes per ASN:                                     21.73
AfriNIC Region origin ASes announcing only one prefix:              617
AfriNIC Region transit ASes present in the Internet Routing Table:  332
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                      132
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1119
Number of AfriNIC addresses announced to Internet:            107667968
    Equivalent to 6 /8s, 106 /16s and 226 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  9808        9524       8705      38  CHINAMOBILE-CN China Mobile Communicati
  7545        5701        784     685  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4867       4193      76  ERX-CERNET-BKB China Education and Rese
 18403        4313        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3595       1043      63  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3352       1840      97  VNPT-AS-VN VNPT Corp, VN
  9498        3083        498     248  BBIL-AP BHARTI Airtel Ltd., IN
  7552        2932       1331      21  VIETEL-AS-AP Viettel Group, VN
  4766        2558      11271     592  KIXS-AS-KR Korea Telecom, KR
 24560        2482        844     409  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd

Complete listing at https://thyme.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        8817      10963    3227  AMAZON-02, US
 11492        4524        300     622  CABLEONE, US
  7155        4176        288     101  VIASAT-SP-BACKBONE, US
 22773        3552       3054     291  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3527       1319      66  SHAW, CA
   749        3150      54961    2402  DNIC-AS-00749, US
 16625        3090       1508    2328  AKAMAI-AS, US
   367        2992       3829    1418  DNIC-ASBLK-00306-00371, US
396982        2685       3596     387  GOOGLE-CLOUD-PLATFORM, US
 30036        2503        359     387  MEDIACOM-ENTERPRISE-BUSINESS, US

Complete listing at https://thyme.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        7342       1713     145  UNI2-AS, ES
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 20940        4092       3398     155  AKAMAI-ASN1, NL
  8551        3460        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2983       2294     918  ROSTELECOM-AS, RU
  9009        2675        247    1386  M247, RO
 34984        2321        362     599  TELLCOM-AS, TR
 58224        1817        943     536  TCI, IR
 13188        1606        100      27  TRIOLAN, UA
 61317        1526        102    1189  ASDETUK www.heficed.com, US

Complete listing at https://thyme.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       11550       3357     601  UNINET, MX
 10620        3530        506     845  Telmex Colombia S.A., CO
 13999        2442        364     643  Mega Cable, S.A. de C.V., MX
 11830        1997        369      64  Instituto Costarricense de Electricidad
 28573        1315       2324     233  Claro NXT Telecomunicacoes Ltda, BR
  3816        1288        757     193  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1272        344     511  Axtel, S.A.B. de C.V., MX
  6147        1114        370      22  Telefonica del Peru S.A.A., PE
 11664        1113        181     435  Techtel LMDS Comunicaciones Interactiva
 26615        1035       2501      49  TIM SA, BR

Complete listing at https://thyme.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1594        393      19  LINKdotNET-AS, EG
 24835        1517        533      27  RAYA-AS, EG
 36992        1356       1518     282  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1051         67      45  ORANGE-COTE-IVOIRE, CI
 36935         922        521      43  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 24757         477         73       5  EthioNet-AS, ET
 37342         472         32       1  MOVITEL, MZ
 15399         451         55      50  WANANCHI-, KE

Complete listing at https://thyme.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       11550       3357     601  UNINET, MX
  9808        9524       8705      38  CHINAMOBILE-CN China Mobile Communicati
 16509        8817      10963    3227  AMAZON-02, US
 12479        7342       1713     145  UNI2-AS, ES
  7545        5701        784     685  TPG-INTERNET-AP TPG Telecom Limited, AU
 39891        4897        290      61  ALJAWWALSTC-AS, SA
  4538        4867       4193      76  ERX-CERNET-BKB China Education and Rese
 11492        4524        300     622  CABLEONE, US
 18403        4313        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4176        288     101  VIASAT-SP-BACKBONE, US

Complete listing at https://thyme.apnic.net/current/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
  9808        9524         9486  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7342         7197  UNI2-AS, ES
 16509        8817         5590  AMAZON-02, US
  7545        5701         5016  TPG-INTERNET-AP TPG Telecom Limited, AU
 39891        4897         4836  ALJAWWALSTC-AS, SA
  4538        4867         4791  ERX-CERNET-BKB China Education and Research Net
 18403        4313         4288  FPT-AS-AP FPT Telecom Company, VN
  7155        4176         4075  VIASAT-SP-BACKBONE, US
 20940        4092         3937  AKAMAI-ASN1, NL
 11492        4524         3902  CABLEONE, US

Complete listing at https://thyme.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     33492  UNALLOCATED  8.6.184.0/23             33650  COMCAST-33650, US
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     40493  UNALLOCATED  8.17.26.0/24              3356  LEVEL3, US
     53775  UNALLOCATED  8.20.88.0/24              7029  WINDSTREAM, US
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
    396894  UNALLOCATED  8.28.201.0/24            46887  LIGHTOWER, US
    394936  UNALLOCATED  8.33.224.0/24            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US

Complete listing at https://thyme.apnic.net/current/data-badAS

Prefixes from the Special Purpose Address Registry (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

Complete listing at https://thyme.apnic.net/current/data-spar

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
23.140.216.0/24      Origin:     27176  DATAWAGON, US
23.140.216.0/24     Transit:     20278  NEXEON, US
23.141.0.0/24        Origin:    395350  RESERVED, ZZ
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.176.160.0/24      Origin:    397327  RESERVED, ZZ
23.176.160.0/24     Transit:     19108  SUDDENLINK-COMMUNICATIONS, US
36.255.139.0/24      Origin:     56050  NEW-SHINE-INTERNET-TH 134 Yenchit Road, 
36.255.139.0/24     Transit:     58913  HCL-TH 4819 Supapong 3 Alley, Srinakarin
41.57.124.0/22       Origin:     37442  RESERVED, ZZ
41.57.124.0/22      Transit:     37204  TELONE, ZW

Complete listing at https://thyme.apnic.net/current/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:16       /9:14      /10:39      /11:102     /12:296     
/13:576     /14:1195    /15:2069    /16:13508   /17:8290    /18:13869   
/19:25176   /20:44517   /21:51321   /22:110018  /23:98949   /24:556548  
/25:739     /26:0       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 12479        6428        7342  UNI2-AS, ES
  8151        5601       11550  UNINET, MX
 39891        3632        4897  ALJAWWALSTC-AS, SA
 11492        3434        4524  CABLEONE, US
  6327        3337        3527  SHAW, CA
  7155        3121        4176  VIASAT-SP-BACKBONE, US
  8551        2928        3460  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2600        3552  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2160        2503  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2094        3530  Telmex Colombia S.A., CO

Complete listing at https://thyme.apnic.net/current/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:2232      2:1376      3:226       4:5         5:4547      6:138    
   7:6         8:1550      9:1        11:172      12:1509     13:379    
  14:2316     15:302      16:198      17:373      18:598      20:280    
  21:4        22:188      23:6405     24:2490     25:6        27:2478   
  29:19       31:2524     32:81       34:25       35:117      36:1996   
  37:4611     38:5135     39:856      40:147      41:3966     42:2090   
  43:2322     44:317      45:16575    46:4339     47:384      49:1801   
  50:1861     51:593      52:1597     54:388      55:968      56:8      
  57:121      58:1890     59:1169     60:996      61:2430     62:2704   
  63:1918     64:5564     65:2334     66:4947     67:3009     68:1325   
  69:4088     70:1197     71:656      72:2951     74:2622     75:1569   
  76:619      77:2447     78:1837     79:2984     80:2115     81:1803   
  82:1501     83:1282     84:1537     85:2984     86:761      87:1980   
  88:1167     89:3853     90:617      91:7818     92:2068     93:2606   
  94:3511     95:4007     96:1280     97:318      98:1082     99:734    
 100:90      101:1071    102:2884    103:31915   104:4554    105:568    
 106:891     107:2561    108:1131    109:4255    110:2120    111:3190   
 112:2052    113:1810    114:1658    115:1975    116:1906    117:2467   
 118:2682    119:1981    120:1810    121:1148    122:2588    123:2188   
 124:1619    125:2505    128:1471    129:1050    130:1029    131:1957   
 132:818     133:423     134:1788    135:307     136:907     137:971    
 138:2635    139:1580    140:1254    141:1293    142:1479    143:1495   
 144:1000    145:340     146:1967    147:1612    148:2424    149:2133   
 150:869     151:1200    152:1849    153:516     154:4770    155:1385   
 156:1934    157:1321    158:1084    159:2233    160:2604    161:1556   
 162:3500    163:1594    164:1708    165:1823    166:1013    167:1729   
 168:3851    169:909     170:4602    171:889     172:3660    173:2976   
 174:991     175:1196    176:3789    177:4493    178:3549    179:2137   
 180:2426    181:3477    182:3453    183:1998    184:2293    185:20504  
 186:4745    187:4073    188:4159    189:3723    190:9254    191:1399   
 192:10946   193:8947    194:7297    195:5189    196:3126    197:2454   
 198:6015    199:6082    200:7917    201:6011    202:10565   203:10029  
 204:4545    205:3682    206:4314    207:3470    208:4129    209:4913   
 210:4462    211:2474    212:4244    213:3579    214:1093    215:60     
 216:6679    217:2761    218:1286    219:582     220:2030    221:976    
 222:836     223:2169   

End of report


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